OEM Lennox Draft Inducer Blower Motor — Y4637
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The genuine OEM Lennox Y4637 is a draft inducer blower motor built to drive the inducer assembly on compatible Lennox furnaces. It creates the induced draft that pulls combustion byproducts through the heat exchanger and out the vent, generating the pressure differential the safety switch must confirm before the burners can light.
Common failure symptoms include a furnace that runs the inducer but won't ignite, grinding, whining, or rattling noises from the inducer housing, slow or intermittent motor operation, and repeated lockouts caused by an open pressure switch. Bearing wear, a shorted winding, or age-related fatigue typically precede complete failure, often showing up first as random no-heat events.
Why OEM matters: The Y4637 is engineered to the exact RPM and airflow your Lennox furnace's board and pressure switch are calibrated for. A generic replacement can under-vent, fail to close the switch, or operate out of spec — inviting nuisance faults, unreliable heating, and extra wear on the heat exchanger. The factory-matched Y4637 restores dependable draft and rated performance while preserving your warranty. In stock and shipping same day before 3PM CST.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days